Wagon-brake.



No. 633,00. Patented Sept. l2, I899.

' D. 6. LONG.

WAGON BRAKE.

Application filed Mar. 31, 1899.) (No Model.)

W/T FSSES g of which the following is a specification.

Y brake applied. Fig. 2 is a longitudinal sec- (ALVIN LONG, OFW'ASHINGTON,

PATENT rarer.

IOlVA, ASSIGNOR ()F ONE-HALF TO XVALTER B. \VILDE, OF SAME PLACE.

WAGON- BRAKE.

SPECIFICATION forming part of Letters Patent No. 633,017, datedSeptember 12, 1899.

Application filed March 31. 1899.

To all whom it may concern/.-

Be it known that I, CALVIN 0. LONG, a citizen of the United States ofAmerica, residing at lVashington, in the county of \Vashington and Stateof Iowa, have invented certain new and useful Improvements in\Vagon-Brakes,

My invention relates to an improvement in wagon-brakes.

The objection to nearly all wagon-brakes is that they do not have enoughleverage or power to lock the wagon; and it is the object of myinvention to obviate this objection by increasing the power and leverageand also the amount of movement of the brake-guard from the wheel whenthe brake is released, so that the brake-blocks will assume a positionfar enough from the wheels to avoid gathering mud.

lVith these objects in view my invention consists in certain novelfeatures of construction and combinations of parts, which will behereinafterdescribed more f ully,and particularly pointed out in theclaim.

In the accompanying drawings, Figure 1 is a view in perspective showingmy improved tional view showing the two extreme positions of the brake,and Fig. 3 is a modification.

A represents the brake-bar, carrying the usual brake-blocks 1 1 andsuspended from the runninggear or bed 2 by means of links or rods 3 3.

13 indicates the usual rock-shaf t, supported in bearings 4 4 on therunning gear or bed and provided, preferably at one end, with anupturned arm 5, to which the connecting-rod G, which extends to thebrake-lever 7, is pivoted. Depending from this rock-shaft, preferably ator near its middle, is an arm 8, and a draw-rod 9, extending rearwardfrom the brake-bar, is provided with a slotted rear end in which toreceive this arm loosely. Heretofore it has been the practice to pass apin through the draw-rod and arm at this intersecting point, and thusgive them a fixed pivoted connection. In the present invention in lieuof this fixed pivotal connection a sliding connection is provided, andthe object of this is to increase the leverage and power of therock-shaft and arm upon the draw-rod when seen No. 711,239. (No model.)

the brakes are applied by giving freedom to the rearend of the draw-rodto travel inward toward the axis of movement of the arm, thus shorteningits length when the power is applied; and a further object of thisparticular connection is to allow the rear end of the draw-rod thebenefit of the whole length of the'arm in which to move when the brakeis released to cause the brake bar and block when released to assume aposition far enough away from the wheels so that they will not collectmud and cause friction upon the wheels when none is required. Thepresent construction insures these two functions, and as a means foraccomplishing it, which is only one of many which might be described,the arm 8 is provided with a cross pin or lug 13 at its outer or lowerend, which limits the downward movement of the draw-rod with respect tothis, and the draw-rod in turn is provided with a notch 10 on its loweredge to receive this pin when the brake is released and afford anabutment for the forward thrust of the drawrod for moving thebrake-blocks from the wheels. The arm 8 is also provided with an offset12 on its rear edge, and the draw-rod is preferably provided with aroller 11, although this is not necessary, to facilitate its movementupon the arm.

From the foregoing the operation Will be manifest. The driver places hisfoot or hand upon the brake-lever in the usual manner, bringing itforward. This causes the rockshaft-to turn and its depending arm 8 toswing backward. This backward movement causes the rear end or the roller11 of the draw-rod to ride up on the arm until it reaches the shoulderor offset 12 thereon, whereupon it stops and further movement of the arm8 in swinging rearward causes a backward movement upon the draw-rod,thus applying the brake with just as much power as the driver cares toexert. When the brake is released, the arm 8 swings forward, the rearend of the draw-rod drops until the pin enters the notch 10, when anyfurthermovement of the arm forward causes the brake-bar to move awayfrom the wheel, and the weight and inclination of the upturned arm 5,the connectingrod 6, and the brake-lever 7, all tend to cause thismovement. So it will be seen that from this differential connectionbetween the arm and draw-rod great power is derived when it is requiredto apply the brakes by shifting the connection of the arm and draw-rodto a point near the axis of the arm, and when less power is required, aswhen removing the brake-rod from the'wheels; but if greatersweep ofmovement is desired, then the full length of the arm is utilized toaccomplish it.

In the modification the same principle is applied in connection with anair-brake. By using this invention on an air-brake double the power canbe applied to the wheels with the same pressure in the cylinder.This,however, is not necessary from the fact that it would cause thewheels to slip; but the point to be gained is that one-half the pressurein the cylinder would do the same work, or the cylinder could be reducedso as to have about one-half the number of square inches and yet givethe same power in applying the brakes and at the same time move the bar6 the required distance away from the wheels in re leasing it. With thissmaller cylinder there would be only one-half the amount of air to bepumped, which would be a saving in this direction ,while using smallerbrakes on the cars.

The spring 15, which is shown in dotted lines, is not absolutelynecessary, but is desirable in insuring the movement of the brake awayfrom the wheels.

It is evident that slight changes might be resorted to in the form andarrangement of the parts described without departing from the spirit andscope of my invention, and hence I do not wish to limit myself to theexact construction herein set forth; but,

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isr The combination with an arm provided withan offset or shoulder 12 thereon at one point and a pin or lug,13 at ornear one end, of a draw-rod having the notch 10 adapted to receive thelug or pin 13 whereby the drawrod may be given a positive thrustbackward when the outer end of the arm is forced in the direction of thenotch, and means for swinging the arm to apply or release the brake.

CALVIN 0. LONG.

In presence of- DANIEL WILDE, O. K. CLAPPER.

